Transfers are different to EFT's (Payments). When you are depositing funds from your Discovery Bank to the EasyEquities account, it is seen as an Inter-Account transfer and the mechanism to send yourself a Proof of Transfer is not available.
However, in the case where you say that the money that you transferred from your Discovery Bank Account to EasyEquities is not reflecting on your EE account, please contact Discovery Bank on 0800 07 96 97 and they will gladly assist you.